> > > > > > Seems to be hrtimers related - CC'ed Thomas.
> > > > > I doubt that. The tick interrupt just finds out, that the machine is
> > > > > stuck in rmmod.
> > > > > > > Also the rmmod hangs and would not exit even with kill -9. It also
> > > > > > > sucks up 100% cpu.
> > > > > Can you please enable CONFIG_PROVE_LOCKING ?
> > > > Luckily I already had :-)
> > > > Here is its output:
> > > So there is no output from lockdep, during the rmmod hang ? The rmmod
> > Nope, just other subsystems (nfs, usb) minutes before that.
> Hmm. Can you provide the output of that ? Might be some stale stuff
> leading to the hang later.
It is output like:
[ 843.122782] usb 7-2: usbfs: USBDEVFS_CONTROL failed cmd newhidups rqt 161 rq 1 len 10 ret -110
[ 1292.121131] usb 7-2: usbfs: USBDEVFS_CONTROL failed cmd newhidups rqt 161 rq 1 len 10 ret -110
and about the nfs server temporarily not available. Please note that I
did not do the rmmod from a nfs mountpoint.
Folkert van Heusden
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